I just tried creating an account on surveyjs.io; I tried to login via github:

I don't think write access is / should be needed for login.
@tsv2013 Sergey, could you please take a look at it?
Thank you,
Andrew
@andrewtelnov Sure
@SamMousa The issue has been fixed some times ago.
When going through the flow of adding my github account it gives me an error though:

I do get an email from github saying the the app was added.
Logging in does not work.
@SamMousa We've changed our github asdapter recently. Could you try to remove all cookies for the "surveyjs.io" site in your browser? Or try login form another browser or incognito mode?
Neither of the methods work.
OK. Thank you. We'll check it.
@SamMousa I've fixed the GitHub OAuth adapter. Could you check it?
Works!